In the experiment of [1]}, units were randomized not only by first or second round and by high or low information, but also whether or not the second round units were shown a list of names corresponding to people who had purchased the insurance product in the first round. When studying the effects of informal communication between rounds, the analysis of [1]} is restricted to the “no info” group which excludes those units who were shown such a list, and we follow their example in our analysis as well.
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